The Hippopotamus is found in sub-Saharan Africa, and its name literally means 'River horse.' It's the third largest land mammal after the Elephant and the Rhinoceros. It spends most of its time in water, only coming on land to graze on grass. Staying in water helps keep its body cool during the day. It also gives birth to its young in water.
A hippo closes its nostrils when it submerges in water, typically resurfacing to breathe every 3 to 5 minutes. The process of surfacing and breathing is automatic, so even when it’s sleeping underwater, it rises and breathes without waking! Don't be fooled by its chubby look, a hippo can easily outrun a human being and can be extremely aggressive, especially when it feels threatened. A male hippopotamus is called a bull, the female a cow, and the baby hippo, a calf. A group of hippos is known as a 'herd,' 'pod,' 'dale,' or 'bloat.' Hippos typically live for about 45 years. Now you know! Awesome, isn't it?